Perrin & Rowe Armstrong 1/2" Therm & Pressure Balance Trim With 3 Functions (Share) U.TAR23W1XMPerrin & Rowe Armstrong 1 2 Thermostatic & Pressure Balance Trim with 3 Functions (Share) U. TAR23W1XM Combined thermostatic and pressure balance trim with shared functionality for flexible shower control. Features Combines thermostatic and pressure balance technologies Set it and forget it temperature memory 2 dedicated functions and 1 shared function Supports up to 3 functions with shared operation Can run showerhead or handshower independently, or